The San Juan Mountains are a rugged mountain range in the Rocky Mountains in southwestern Colorado. The area is highly mineralized (the Colorado Mineral Belt) and figured in the gold and silver mining industry of early Colorado. Major towns, all old mining camps, include Creede, Lake City, Silverton, Ouray, and Telluride. Large scale mining is now uneconomical in the region, although independent prospectors still work claims throughout the range. The last large scale holdouts were the Standard Metals operation on Red Mountain Pass which operated until late in the 20th century and the ill-fated Summitville mine on the eastern slope of the San Juans.

The Summitville mine was the scene of a major environmental disaster in the 1990s when the hastily installed liner of a cyanide-laced tailing pond began leaking heavily. Summitville is in the Summitville caldera, one of many extinct volcanoes making up the San Juan volcanic field. One, the La Garita Caldera, is in diameter. Large beds of lava, some extending under the floor of the San Luis Valley, are characteristic of the eastern slope of the San Juans.

There is some tourism in the region, with the narrow gauge railway between Durango and Silverton being an attraction in the summer. Jeeping is popular on the old trails which linked the historic mining camps, particularly thrilling is the Black Bear Road. Visiting old ghost towns is popular, as are wilderness trekking and mountain climbing. The San Juans are extremely steep; only Telluride has made the transition to ski resort. Purgatory (now known as Durango Mountain Resort) is a small ski area north of Durango near the Tamarron Resort. There is also skiing on Wolf Creek Pass at the Wolf Creek ski area. Recently Silverton Mountain ski area has begun operation in Silverton. It is a highly rated extreme ski area and is currently available by reservation only.

The Rio Grande rises on the east side of the range. The other side of the San Juans, the western slope of the continental divide, is drained by tributaries of the San Juan, Dolores and Gunnison rivers, which all flow into the Colorado River.

The San Juan and Uncompahgre National Forests cover a large portion of the San Juan Mountains.

Prominent peaks

History of the area

Ore wagons, San Juan Mountains, circa 1900?

See also

• Geography of Colorado
• La Garita Mountains
• La Plata Mountains
• Mountain peaks of Colorado
• Mountain peaks of the Rocky Mountains
• Mountain ranges of Colorado
• Needle Mountains
• Rocky Mountains
• San Miguel Mountains
• Sneffels Range

References

Further reading

• Bove, D. et al. (2001). Geochronology and geology of Late Oligocene through Miocene volcanism and mineralization in the western San Juan Mountains, Colorado [U.S. Geological Survey Professional Paper 1642]. Washington, D.C.: U.S. Department of the Interior, U.S. Geological Survey.
• Lippman, P.W. (2006). Geologic map of the central San Juan Caldera Cluster, southwestern Colorado [Geologic Investigations Series I-2799]. Reston, VA: U.S. Department of the Interior, U.S. Geological Survey.

External links

• Rocky Mountains @ Peakbagger
  • Southern Rocky Mountains @ Peakbagger
    • San Juan Mountains @ Peakbagger

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